The photovoltaic system consists of three single-axis tracking units mounted to the ground.

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In addition to the oversized globe, Broessel has cooked up a mobile version of the contraption for domestic use and an array of much smaller ball lenses with dual-axis tracking that offers 40 percent efficiency.

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In order to get the functionality it needed, APX grafted a 5 megapixel camera, mic and a full suite of motion sensors to provide nine-axis head tracking onto a Moverio headset.

ENGADGET